package com.hmdp.utils;


import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;



public class LoginInterceptor implements HandlerInterceptor {

        @Override
        public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
            // 1.判断是否需要拦截（ThreadLocal中是否有用户）
            if (UserHolder.getUser() == null) {
                // 没有，需要拦截，设置状态码
                response.setStatus(401);
                // 拦截
                return false;
            }
            // 有用户，则放行
            return true;
        }
    }

